The whole Twitter craze wouldn’t be complete without a separate, but thorough index of Twitter users, now would it? TwitDir is just that. Using Twitter’s API they index Twitterers on a regular basis.
Of course only public Twitter users are added to the TwitDir database, so if you prefer to be unlisted, it’s absolutely not a problem. You can also directly connect the site if you can’t wait to be included in the directory. TwitDir works like a search engine. To find someone, simply type in their name/location in the search bar; alternately, you can easily check out the top 100 followed, the top 100 updaters and the top 100 followers. TwitDir is free, but they do accept donations.
Twitdir.com In Their Own Words
“TwitDir is a Twitter users (some call them twitterers) directory, no more!”
Why Twitdir.com It Might Be A Killer
Twitter is hugely popular and its numbers are growing everyday. TwitDir is great for seeing who the top Twitterers are in real time. It’s a straightforward tool that lets you easily search for Twitter users and check out their stats.
Some Questions About Twitdir.com
How up to date is TwitDir? What are their future plans? Will they add more functionalities? 
